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Tuesday, September 30, 2003


Wesley Clark - caught in a time warp?
If so, it might be one of his own making. Bill Hobbs records that Clark has - drumroll, please - actually said on the campaign trial that he thinks that time travel is possible and that it will be accomplished. And he strongly implied that as president he will allocate federal money to develop it.

Now, a small word in Clark's defense (but not a defense of time travel notions). I have seen only the news story of his remarks, have not seen a transcript. What Clark is actually quoted as saying is,

"I still believe in e=mc², but I can't believe that in all of human history, we'll never ever be able to go beyond the speed of light to reach where we want to go," said Clark. "I happen to believe that mankind can do it.

"I've argued with physicists about it, I've argued with best friends about it. I just have to believe it. It's my only faith-based initiative." Clark's comment prompted laughter and applause from the gathering.
In science fiction and the popular conception, faster-than-light (FTL) travel would result in moving back in time; hence Bill Hobbs played it that way.

But not so fast. Is there actually any hard theoretical physics behind that notion? I don't know but I suspect not. While the speed of light is a cosmic constant, it's not clear that exceeding it would result in actual time reversal.

(Actually, a close physicist friend of mine told me that once you start working the formulas for speeds of a significant fraction of C (C=speed of light) then nothing at all is either clear or simple.)

As I recall, theory holds that if an object approaches C, weird things start happening to its mass-volume ratio. At any rate, a physicist consulted for the article was Gary Melnick, "a senior astrophysicist at the Harvard-Smithsonian Center for Astrophysics, [who] said Clark's faith in the possibility of faster-than-light, or FTL, travel was "probably based more on his imagination than on physics."
While Clark's belief may stem from his knowledge of sophisticated military projects, there's no evidence to suggest that humans can exceed the speed of light, said Melnick. In fact, considerable evidence posits that FTL travel is impossible, he said.

"Even if Clark becomes president, I doubt it would be within his powers to repeal the powers of physics," said Melnick ...
And if he tries, we should call for an Independent Counsel! Yeah!

by Donald Sensing, 9/30/2003 10:20:46 PM. Permalink |  





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